<template>
  <div class="fixed">
    <div class="bgColor">
      <h1 class="main-shopcart">购物车</h1>
    </div>
    <div class="container">
      <div class="main">
        <div class="nav">
          <span class="left">全部课程</span>
          <span class="right">
              <router-link to="/about/order">
                  <a href="#">查看更多订单</a>
              </router-link>
          </span>
        </div>
        <ul class="head">
          <li class="item check">
            <el-checkbox v-model="allChecked" @change="selectAll">全选</el-checkbox>
          </li>
          <li class="item classInfo">课程信息</li>
          <li class="item price">单价</li>
          <li class="item count">数量</li>
          <li class="item total">金额</li>
          <li class="item function">操作</li>
        </ul>
        <div v-if="orderList.length > 0">
          <ul class="haveorder" v-for="(item,index) in orderList" :key="index" >
            <li class="order-item">
              <el-checkbox v-model="item.checked" @change="selectSingleProduct($event, item)"></el-checkbox>
            </li>
            <li class="order-item info" >
              <div class="courseimg" >
                <img :src="item.courseCover" alt="">
              </div>
              <div class="course-name">{{item.courseName}}</div>
            </li>

            <li class="order-item">￥{{item.discountPrice}}</li>
            <li class="order-item num">{{item.counter}}</li>
            <li class="order-item totoalprice">￥{{item.discountPrice * item.counter}}</li>
            <li class="order-item delete" >
              <a href="javascript:;" @click="deleteOrder(item.id)">
                <i class="el-icon-delete"></i>
                <span class="deletd-text">删除</span>
              </a>
            </li>
          </ul>
        </div>
        <div class="noOrder" v-else>
          <img src="/image/norder365.png" alt="">
          <div class="order-alert">哎呦！暂无订单</div>
        </div>
        <el-divider class="line"></el-divider>
        <ul class="foot">
          <li class="foot-item">已选课程<span class="unique">{{getCount}}</span></li>
          <li class="foot-item">合计<span class="unique">{{price}}</span></li>
          <li >
            <button class="btn" @click="getSelecteds">去结算</button>
          </li>
        </ul>
      </div>
    </div>
  </div>
</template>

<script>
import { mapState, mapActions } from "vuex";
export default{
  data(){
    return{
      orderList:[],//加入购物车的商品
      allChecked:false,
      selectedProducts:[],//选中的商品
      tokens:'',
      count:0,
      price:0,
    }
  },
  created(){
    this.getShopCarList()
  },
  watch:{
    selectedProducts:{
      handler(newval,oldval){
        this.price = 0
        newval.forEach(item => {
          this.price += item.discountPrice * item.counter
        })
      },
      immediate: true
    },
  },
  computed:{
    getCount(){
      return this.selectedProducts.length
    },
  },
  methods:{
    ...mapActions(["saveCartNumAction"]),
    //全选按钮
    allCheck(){
      if(this.orderList.length === this.selectedProducts.length){
        this.allChecked = true
      }else{
        this.allChecked = false
      }
    },
    // 去结算
    getSelecteds(){
      if(!this.selectedProducts || this.selectedProducts.length <= 0){
        this.$message({
          type: "error",
          message: "请选择课程再结算！"
        })
        return;
      }
      let arr = new Array();
      this.selectedProducts.forEach(item => {
        arr.push({'number':item.counter,"id":item.courseId})
      })
      localStorage.setItem('selectedArr',JSON.stringify(arr))
      this.$router.push("/confirmOrder")
    },
    //全选
    selectAll(e){
      if(e){
        this.orderList.forEach(item => {
          item['checked'] = true
        })
        this.selectedProducts = this.orderList;
      }else{
        this.orderList.forEach(item => {
          item['checked'] = false
        })
        this.selectedProducts = []
      }
    },
    //数量 、价格变化
    selectSingleProduct(e, item){
      if(e){
        this.selectedProducts.push(item);
        this.allCheck()
      }else{
        for(let i = 0;i < this.selectedProducts.length;i++){
          if(item.id === this.selectedProducts[i].id){
            this.selectedProducts.splice(i,1);
          }
        }
        this.allCheck()
      }
    },
    //获取购物车数据
    getShopCarList(){
      this.$getShopCarList().then(res => {
        let list = res.data.list
        list.forEach(item => {
          item['checked'] = true
        })
        this.orderList = JSON.parse(JSON.stringify(list))
        this.selectedProducts = JSON.parse(JSON.stringify(list))
        this.allCheck()

      })
    },

    //删除购物车数据
    deleteOrder(id){
      this.$confirm('确定是否删除该课程', '警告', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(() => {
        this.$createToken().then(res => {
          this.tokens = res.data.token
          this.$deleteShopCar({id:id,token:this.tokens}).then(response => {
            if (response.meta.code === '200') {
              getShopCarCounter().then((res) => {
                if (res.meta.code == '200') {
                  this.saveCartNumAction(res.data.counter)
                } else {
                  this.$message({
                    message: res.meta.msg,
                    type: "error",
                  });
                }
              });
              this.$message({
                type: 'success',
                message: '删除成功'
              })
              this.getShopCarList()
            }
          })
        })
      }).catch(err => {})
    }
  }
}
</script>

<style scoped>
.fixed{
  /*position: relative;*/
  width: 100%;
  height: 100%;
  background: #FFFFFF;
}
.bgColor{
  width: 100%;
  height: 200px;
  background-color: red;
  background: linear-gradient(-45deg, #ee7752, #e73c7e, #23a6d5, #23d5ab);
  background-size: 400% 400%;
  animation: gradient 15s ease infinite;
}
@keyframes gradient {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}
.container{
/*  position: absolute;
  left: 50%;
  top: 50%;*/
  /*transform: translate(0,-15%);*/
  width: 1200px;
  margin: -100px auto 50px auto;
  background: #EBEDF2;
  border-radius: 12px;
  box-shadow: 0px 2px 5px #888888;
}
.main{
  padding:20px;
  border-radius: 5px;
}
.main-shop{
  position: relative;
  display: flex;
  align-content: center;
}
.main-shop i{
  font-size: 35px;
  padding: 20px 10px 0 0;
  color: #FF4400;
  font-weight: bold;
}
.main-shopcart{
  width: 1200px;
  margin: 0 auto;
  height: 42px;
  font-size: 24px;
  font-family: Microsoft YaHei;
  font-weight: bold;
  line-height: 35px;
  color: #FFFFFF;
  padding: 30px 0;
  opacity: 1;
}
.nav{
  display: flex;
  justify-content: space-between;
  border-bottom: 2px solid #E6E6E6;

}
.nav .left{
  width: 80px;
  height: 26px;
  font-size: 18px;
  font-family: Microsoft YaHei;
  font-weight: bold;
  line-height: 0px;
  color: #FF4400;
  opacity: 1;
  border-bottom: 2px solid #FF4400;
}
.nav .right{
  width: 108px;
  height: 24px;
  font-size: 14px;
  font-family: Microsoft YaHei;
  font-weight: 400;
  line-height: 0px;
  color: #333333;
  opacity: 0.5;
}

/* 头部开始 */
.head{
  display: flex;
  padding: 0 10px;
  margin: 20px 0;
  width: 100%;
  height: 35px;
  line-height: 35px;
  background: #FCFCFC;
  opacity: 1;
  border-radius: 0px;
  box-sizing: border-box;
  border-radius: 5px;
  box-shadow: 0px 2px 5px 2px #cccccc;
}
.head .item{
  width: 150px;
  font-size: 14px;
  color: #333333;
}
.check .all{
  margin-right: 10px;
}
.check .text{
  width: 1487px;
  height: 40px;

}
.classInfo{
  width: 400px!important;
  color: #333333;
}
/* 头部结束 */

/* 订单开始 */
.haveorder{
  display: flex;
  width: 100%;
  height: 200px;
  background: #FCFCFC;
  margin-bottom: 10px;
  border-radius: 5px;
  box-shadow: 0px 2px 5px 2px #cccccc;
}
.haveorder .order-item{
  height: 200px;
  line-height: 200px;
  margin:  5px;
}
.order-item:first-child{
  width: 30px;
}
.order-item{
  width: 150px;
  font-size: 16px;
  color: #333333;
}
.totoalprice{
  color: #E2231A;
}
.num{
  width: 120px !important;
  padding-left: 15px;
}
.info{
  display: flex;
  width: 470px !important;
  height: 200px;
  line-height: 200px;
}
.courseimg{
  margin:40px 20px 40px 0;
  width: 200px;
  height: 120px;
}
.courseimg img{
  width: 100%;
  height: 100%;
}
.info .course-name{
  width: 300px;
  word-break: keep-all;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.delete{
  cursor: pointer;
}
.deletd-text{
  margin-left: 5px;
}

/* 订单结束 */

/* 暂无订单开始 */
.noOrder{
  width: 100%;
  height: 100%;
  text-align: center;
  margin:200px 0;
}
.order-alert{
  height: 31px;
  font-size: 20px;
  font-family: Microsoft YaHei;
  font-weight: 400;
  line-height: 0px;
  color: #B5B9BC;
  opacity: 1;
  margin:20px 120px;

}
/* 暂无订单结束 */
.foot{
  display: flex;
  justify-content: flex-end;
  width: 100%;
  height: 40px;
  line-height: 40px;
  color: #333333;
  margin-bottom: 10px;
}
.foot-item{
  width: 120px;
  height: 40px;
  line-height: 40px;
  font-size: 14px;
  font-weight: 400;
  color: #333333;
}
.unique{
  margin-left: 5px;
  font-size: 24px;
  color: #FF4400;
}
.btn{
  width: 120px;
  height: 40px;
  margin-left: 20px;
  border: none;
  color: #FFFFFF;
  font-size: 22px;
  border-radius: 5px;
  background: #FF4400;
  cursor: pointer;
  box-shadow: 0px 3px 5px 2px #ff727f;
}
</style>
